text: #! /usr/bin/env python
  #
  # Protocol Buffers - Google's data interchange format
  # Copyright 2008 Google Inc.  All rights reserved.
  # https://developers.google.com/protocol-buffers/
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  """Negative compilation unit tests for arena API."""
  
  import unittest
  
  from google3.testing.pybase import fake_target_util
  from google3.testing.pybase import unittest
  
  
  class ArenaNcTest(unittest.TestCase):
  
    def testCompilerErrors(self):
      """Runs a list of tests to verify compiler error messages."""
  
      # Defines a list of test specs, where each element is a tuple
      # (test name, list of regexes for matching the compiler errors).
      test_specs = [
          ('ARENA_PRIVATE_CONSTRUCTOR',
           [r'calling a protected constructor']),
          ('SANITY', None)]
  
      fake_target_util.AssertCcCompilerErrors(
          self,                         # The current test case.
          'google3/google/protobuf/arena_nc',  # The fake target file.
          'arena_nc.o',                 # The sub-target to build.
          test_specs                    # List of test specifications.
          )
  
  if __name__ == '__main__':
    unittest.main()
  